Update README.md

Author: rzcoder

README.md

@@ -146,14 +146,14 @@ const privateDer = key.exportKey('pkcs1-der');
 
 ```javascript
 key.importKey({
-    n: new Buffer('0086fa9ba066685845fc03833a9699c8baefb53cfbf19052a7f10f1eaa30488cec1ceb752bdff2df9fad6c64b3498956e7dbab4035b4823c99a44cc57088a23783', 'hex'),
+    n: Buffer.from('0086fa9ba066685845fc03833a9699c8baefb53cfbf19052a7f10f1eaa30488cec1ceb752bdff2df9fad6c64b3498956e7dbab4035b4823c99a44cc57088a23783', 'hex'),
     e: 65537,
-    d: new Buffer('5d2f0dd982596ef781affb1cab73a77c46985c6da2aafc252cea3f4546e80f40c0e247d7d9467750ea1321cc5aa638871b3ed96d19dcc124916b0bcb296f35e1', 'hex'),
-    p: new Buffer('00c59419db615e56b9805cc45673a32d278917534804171edcf925ab1df203927f', 'hex'),
-    q: new Buffer('00aee3f86b66087abc069b8b1736e38ad6af624f7ea80e70b95f4ff2bf77cd90fd', 'hex'),
-    dmp1: new Buffer('008112f5a969fcb56f4e3a4c51a60dcdebec157ee4a7376b843487b53844e8ac85', 'hex'),
-    dmq1: new Buffer('1a7370470e0f8a4095df40922a430fe498720e03e1f70d257c3ce34202249d21', 'hex'),
-    coeff: new Buffer('00b399675e5e81506b729a777cc03026f0b2119853dfc5eb124610c0ab82999e45', 'hex')
+    d: Buffer.from('5d2f0dd982596ef781affb1cab73a77c46985c6da2aafc252cea3f4546e80f40c0e247d7d9467750ea1321cc5aa638871b3ed96d19dcc124916b0bcb296f35e1', 'hex'),
+    p: Buffer.from('00c59419db615e56b9805cc45673a32d278917534804171edcf925ab1df203927f', 'hex'),
+    q: Buffer.from('00aee3f86b66087abc069b8b1736e38ad6af624f7ea80e70b95f4ff2bf77cd90fd', 'hex'),
+    dmp1: Buffer.from('008112f5a969fcb56f4e3a4c51a60dcdebec157ee4a7376b843487b53844e8ac85', 'hex'),
+    dmq1: Buffer.from('1a7370470e0f8a4095df40922a430fe498720e03e1f70d257c3ce34202249d21', 'hex'),
+    coeff: Buffer.from('00b399675e5e81506b729a777cc03026f0b2119853dfc5eb124610c0ab82999e45', 'hex')
 }, 'components');
 const publicComponents = key.exportKey('components-public');
 console.log(publicComponents);
@@ -169,7 +169,7 @@ If you want to only import the public key use `'components-public'` as an option
 
 ```javascript
 key.importKey({
-    n: new Buffer('0086fa9ba066685845fc03833a9699c8baefb53cfbf19052a7f10f1eaa30488cec1ceb752bdff2df9fad6c64b3498956e7dbab4035b4823c99a44cc57088a23783', 'hex'),
+    n: Buffer.from('0086fa9ba066685845fc03833a9699c8baefb53cfbf19052a7f10f1eaa30488cec1ceb752bdff2df9fad6c64b3498956e7dbab4035b4823c99a44cc57088a23783', 'hex'),
     e: 65537,
 }, 'components-public');
 ```